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It is known by many other names, including knee coaster, knee cruiser, knee caddy, orthopaedic scooter, or leg walker. [ 1 ] Over the years, it has taken on many forms—from small-wheeled devices suitable for indoor use, to larger, sturdier units capable of use outside on grass or paved surfaces.
Narrow doors and small windows are often square topped, being bridged by a solid stone lintel which may be supported on projecting brackets. Some stone buildings have retained wooden lintels. Larger doorways and windows are topped with semi-circular arches , as are arcades and vaults.
Stairclimber wheels. A stairclimber is a type of trolley fitted with rotating wheels or tracks so that it can be pushed or pulled up or down steps or a stairway.Stairclimbers can be manual or battery-powered, and are commonly found in wheel, track, push arm or walker variants.
The spiral stair is a type of stairway which, due to its complex helical structure, has been introduced relatively late into architecture. Although the oldest example dates back to the 5th century BC, [ 1 ] it was only in the wake of the influential design of the Trajan's Column that this space-saving new type permanently caught hold in ancient ...
A different approach to the walker is the rollator, also called wheeled walker, invented by the Swede Aina Wifalk in 1978. Wifalk had polio . [ 9 ] [ 10 ] Although originally a brand name, "rollator" has become a genericized trademark for wheeled walkers in many countries, and is also the most common type of walker in several European countries.
The large interval between columns necessitates the use of a wooden architrave. Araeosystyle An architectural term applied to a colonnade, in which the intercolumniation is alternately wide and narrow. Arcade A passage or walkway covered over by a succession of arches or vaults supported by columns. Blind arcade or arcading: the same applied to ...